For halogenated organic compounds，antibiotics，and other emerging contaminants that are persistent and highly toxic，micro-electrolysis fillers can effectively disrupt the chemical structures of these contaminant molecules and achieve the effect of deep mineralization through direct electron reduction and electrochemical oxidation. However，although the traditional micro-electrolysis process has achieved certain results，there are still many thorny problems. For example，the stability of the fillers is poor，their service life is short，and they are prone to caking and passivation，which leads to clogging of the reactor，requiring frequent replacement of the fillers. To overcome these problems，granulation is usually employed to increase the interfacial bonding strength between iron powder and activated carbon powder. However，previous studies have often focused on the influence of the composition or preparation methods of the fillers on their performance，while the role of the binders has been subtle and difficult to detect. Through in-depth investigations，it has been found that binders play a key role as the 'unsung heroes' in enhancing the performance of micro-electrolysis fillers and that their functional groups and chemical structures have a profound effect on the performance of the fillers. They can not only strengthen the mechanical strength of fillers，improve their stability and anti-passivation ability，promote the mass transfer process，prevent filler caking，and prolong the service life of fillers，but also increase the utilization rate of electrons and catalyze the occurrence of reactions，thereby further enhancing the degradation activity of emerging pollutants. Given this，this paper systematically summarizes the interfacial bonding mechanisms of commonly used binders in different granulation methods，analyses the deep action mechanisms of binders in enhancing the performance of micro-electrolysis fillers，discusses the influence laws of binder types and contents on the fillers，and looks forward to the development of new fillers，and looks forward to the development of new high-performance binder materials，the optimizing of the process parameters of binders in the filler preparation process，and the in-depth exploration of the action mechanisms between binders and active components of fillers，with the expectation of promoting the development of micro-electrolysis fillers in the field of environmental management.